I've accidentially deleted a virtual hosts file 010-foo.conf. The Apache2.4 is still running without reload or restart so far. Is there a way to see actual config of the file which isn't there any more (maybe via apachectl command or whatever)?

  • 3
    It's easiest to restore your backup. – Michael Hampton Oct 13 '15 at 16:48
  • This file was written and deleted before backup :( - but sure, you're right! – colidyre Oct 13 '15 at 16:49

If you don't have mod_info installed, you can use gcore to dump the parent Apache process (the one owned by pid 1) memory to a file, then search it for "VirtualHost" or something. I just tested it on my system and it works. You'll have to mess around with something like grep to cut out what you want and replace the config file.

gcore <pid>
less core.<pid>

EDIT (from OP):

If you don't have gcore, you can install it via apt-get install gdb (Ubuntu). The pid file is typically located under /var/run/apache2/apache2.pid. Then you can do the commands mentioned above and search the binary files, e.g. with grep -obUaP "text to search" <dump file>, see here for more information about using grep for binary files.

  • Oh, ok. I fixed the problem, already. But I tried a test with your solution and it gives me a huge dump file with the wanted information in it. I will edit your very helpful answer. Thanks a lot for pointing that out. It will surely help other people with the same problem. It could be time-consuming getting all the information, but they are present there! That's really good. – colidyre Oct 14 '15 at 9:05

If you installed mod_info, you can use that to print your server configuration. In my case, I can see the entire configuration as Apache sees it, including all VirtualHosts.

If you don't have mod_info installed and working already, this information may not be available to you.

You can also see some VirtualHost information on the commandline by using httpd -S. It's not complete, but it's better then nothing:

Show the settings as parsed from the config file (currently only shows the virtualhost settings).
  • Thanks. This was helpful. But it seems that not all information are sent. There was also a path to a wsgi file which I can't see in the output of apachectl -S command (ok, you mentioned it). – colidyre Oct 13 '15 at 17:20
  • You would think that a program running in memory would be able to show you it's configuration as it currently stands. – Stefan Lasiewski Oct 13 '15 at 17:27
  • Oh, I have to correct myself: it seems that apachectl -S looks at the file in sites-enabled (which links to sites-available). Yes, something like this. Showing program's config out of memory or from temporary written file or whatever. I know the chances aren't good for that. – colidyre Oct 13 '15 at 17:27
  • Technically, apachectl first checks in the global system configuration files (On RHEL, this would normally be /etc/sysconfig/httpd). From there, it should receive the correct ServerRoot setting. On my setting, /etc/sysconfig/httpd says OPTIONS='-d /etc/httpd', and therefore httpd is called as httpd -d /etc/httpd. /etc/httpd would need to include the sites-enabled directory somewhere. – Stefan Lasiewski Oct 13 '15 at 17:42
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    I agree. If you don't have mod_info installed already, you probably cannot retrieve the configuration for that one VirtualHost. – Stefan Lasiewski Oct 13 '15 at 22:07

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